State of soil fertility in Lviv Region

Abstract

The main indicators of soil fertility based on the results of an agrochemical survey of agricultural lands of Lviv region in the XI round (2016–2020) are given. It was established that the acidity of the soil solution in the region is dominated by lands with a neutral reaction of the soil solution (31.3%). The weighted average indicator of saline pH is 6.0, which corresponds to a close to neutral reaction of the soil solution. According to the level of humus provision, soils with an average humus content prevail (36.1%) and the weighted average humus content in the region is 2.6%. According to the content of easily hydrolyzable nitrogen, most of the lands have a low (60.4%) and medium nitrogen content (18.0%). The weighted average indicator of easily hydrolyzable nitrogen content for the reporting period is 125.6 mg/kg of soil, which corresponds to the low availability of this element. The region is dominated by lands with increased (25.1%) and high content of mobile phosphorus compounds (25.3%) and the weighted average indicator of the content of mobile phosphorus compounds is 107.2 mg/kg, which corresponds to increased availability. In terms of the content of mobile potassium compounds, lands with average potassium content (30.3%) prevail and the weighted average indicator of the content of mobile potassium compounds is 72.2 mg/kg, which corresponds to the average supply with macro element. It was established that in Lviv region, the largest area is occupied by soils of average quality (52.2%), and the average weighted assessment of agricultural land in Lviv region is 43. A comparison of the qualitative assessment of the soils of Lviv region for the X (2011–2015) and XI rounds (2016–2020) of agrochemical examinations is carried out. The results established that the quality of the soils in the Starosambir, Mostysky, Radekhiv and Drohobytsky districts has hardly changed. The quality assessment of the soils of Busky, Zhovkivskyi, Kamianka-Buskyi and Sokalskyi districts improved by 2–4 points, the qualitative assessment of the land condition of Peremyshlyanskyi, Zolochivskyi and Yavorivskyi districts improved by 7-19 points. A decrease in land quality indicators by 2-5 points was recorded in Brodivskyi, Pustomytivskyi, Sambirskyi and Stryiskyi districts, indicators of the qualitative assessment of land condition in Zhydachivskyi and Mykolaivskyi districts worsened by 12-13 points.